近床面风沙输移风洞实验的光学测量研究进展

 近床面风沙输移是一个复杂的多尺度非线性随机过程，一直以来都是风沙物理学领域持续关注的热点问题，对此过程的准确测量则变得尤为关键。本文回顾了近年来针对近床面风沙输移风洞实验的光学测量技术，主要包括激光测速、高速摄影及一些新兴手段，并简要评价了其特点和适用性。最后，对目前存在的问题及未来的发展趋势进行了探讨。

Review of optical measurement of near-surface aeolian sand transport in wind tunnel experiment

Near-surface aeolian sand transport is a very complex process which involves the problems of multiple scales, nonlinearity and randomness, so it has always been a focus of the study in wind-blown sand physics. This paper reviews the recent development of optical measurement techniques in wind tunnel experiments, including laser velocity measurement, high-speed photography, and other novel systems. Their properties and applicabilities are briefly analyzed. Finally, some existing problems and future issues in wind tunnel experiment of aeolian sand transport based on the optical measurement are discussed.